The trans-boat with tail appears to be unusually versatile as a synthesis reactant.
In an obsoleted step in the star-based middleweight volcano synthesis:
x=41, y = 32, rule = B3/S23
3bo$4bo$2b3o8bo$14b2o$13b2o2$7bo23bo$8b2o20bo$7b2o21b3o$36bo$35bo$35b
3o8$6bo19b2o10b2o$6bo19b2o10bobo$4b2ob2o29bo$19b2o5b2o$2bobo3bobo7bo2b
o3bobo$2bo7bo4b2o2bobo2bobo$2o9b2obo2b2obo3bo$2bo7bo4b2o2bo3b2o$2bobo
3bobo7bo$19b3o$4b2ob2o12bo$6bo$6bo!
In a particularly difficult step in the circle of fire synthesis:
x=47, y = 49, rule = B3/S23
19bo$20bo$18b3o$38bo$37bo$37b3o$2bo$obo$b2o16bobo$20b2o$20bo2$42bobo$
42b2o$43bo3$16b2o$17bo$14b3o$14bo2$16b2o7b2ob2o$16bobo5bob2obo$17bo6bo
$18b3o2b2o$20bo2$20bo5b2ob2o2b2o$19bobo3bobob2o2b2o$19bobo2bo$16b2obob
obob2o$15bo2b2obob2o2bo4b2o$15b2o4bo4b2o4b2o$17b4ob4o$15b2o4bo4b2o4b2o
$15bo2b2obob2o2bo4b2o$3b2o11b2obobobob2o$2bobo14bobobo$4bo14bobobo$20b
obo$21bo5$44b2o$44bobo$44bo!
In a bookend-to-tub converter:
x=32, y = 40, rule = B3/S23
31bo$29b2o$30b2o$obo$b2o$bo8bo$11b2o$10b2o8$22b2ob2o2b2o$8b3o12bobo3b
2o$10bo10bobobo$9bo11b2o2bob4o$25bobo2bo$26bo$20b2o$19bobo$18bobo$5b2o
11bo$6b2o9b2o$5bo3$17b2o$17b2o$7b2o$6bobo$8bo$27b3o$27bo$28bo$2b2o$bob
o$3bo!
As a high-clearance traffic light predecessor inserter where nothing else would fit:
x=43, y = 40, rule = B3/S23
41bo$26bobo11bo$26b2o12b3o$3bobo21bo$4b2o$4bo3$38bo$28b2o8bobo$27bobo
3bo4b2o$27b2o3bo$32b3o$24b2o$23bobo$17b2o3bobo$17b2o3bo$21b2o$17b2o$
16bo2bo$17bobo18b3o$18bo19bo$39bo$16b5o$3o12bo5bo$2bo13b3obo$bo16b2o7$
34b2o$33b2o$35bo2$12b2o$13b2o$12bo!
In a difficult synthesis component:
x=60, y = 64, rule = B3/S23
2bo$obo$b2o16$30b2o$29b3o$29b3o$29b2obo$30b3o$31bo$20bo$18bobo$19b2o2$
17bo$18bo$16b3o3$10bo15b2o$8bobo9bobo3bo$9b2o10b2o4bo$21bo6bo5b2o6bo8b
obo$29bo4b2o5bobo7b2o$23bobo4bo10bobo8bo$24b2o5bo2b2o3b2obo$24bo7bo2bo
2bobo$33b2o3bo2bo$39b2o$36bo$34b3o$33bo5b2o$32bobo3bo2bo13b3o$32b2o5b
2o14bo$56bo$19b3o$21bo$20bo$51b3o$23b3o25bo$25bo26bo$24bo$58bo$21b2o
34b2o$20bobo34bobo$22bo10bo$32b3o$32bob2o$33b3o$33b2o!
In a final step for dinner table:
x=59, y = 42, rule = B3/S23
7bo$8bo38bo$6b3o8bo29bobo$18b2o27b2o$17b2o2$11bo21bo11bobo$12b2o18bo8b
o3b2o$11b2o19b3o4b2o5bo$40b2o$54bo$54bobo$obo51b2o$b2o$bo5$11b2o15b2o$
10bo2bo5b2obo5bobo4b2o$10bo2bo5b2ob3o4b2o3bobo2b2o13bobo$11b2o12bo7bob
o3bobob2o9b2o$24bobo5bobo5b2ob2o10bo$25b2o4bobo$32bo4b2o$38bo$29b2o7bo
bo$23b2o4bobo7bobo$10b3o11bo6bo8b2o$12bo8b3o7b2o$11bo9bo21b2o$43bobo8b
2o$44b2o7b2o$9b3o43bo$11bo$10bo3$57bo$56b2o$56bobo!